16866540 has 36 divisors (see below), whose sum is σ = 51162384. Its totient is φ = 4497696.

The previous prime is 16866527. The next prime is 16866541. The reversal of 16866540 is 4566861.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16866495 and 16866504.

It is not an unprimeable number, because it can be changed into a prime (16866541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46672 + ... + 47031.

Almost surely, 2^16866540 is an apocalyptic number.

16866540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16866540 is an abundant number, since it is smaller than the sum of its proper divisors (34295844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16866540 is a wasteful number, since it uses less digits than its factorization.

16866540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93718 (or 93713 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 16866540 is about 4106.8893337902. The cubic root of 16866540 is about 256.4535214395.

The spelling of 16866540 in words is "sixteen million, eight hundred sixty-six thousand, five hundred forty".